The official HTCondor logo comes in two varieties as shown below, one including the "High Throughput Computing" tag-line and one without the tag-line. The logo is also available in a variety of file formats and coloring situations.

If you want to match the logo (say, to create an HTCondor Week logo), this is roughly how the logo was created. This is a reconstruction, not the original work:

• HTC - Helvetica Neue Bold, -16% letter spacing. T is set in red and the crossbar extended.
• ondor - Helvetica Neue Light, -3.3% letter spacing
• Artificially extend crossbar of the T

Helvetica Neue Bold and Light are available on modern Mac OS X computers. It's not usually present on Windows or Linux.